package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {

        // 获取前端输入用户名和密码
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //密码比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 添加员工
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        // 1. 封装数据
        Employee employee = new Employee();
        // 封装数据，将DTO中的数据拷贝到entity中
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置默认状态为启用
        employee.setStatus(StatusConstant.ENABLE);
        // 密码加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 设置账号的状态，默认正常状态 1表示正常 0表示锁定
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和修改人id
        //System.out.println("ServiceImpl: "+Thread.currentThread().getId()); // 获取当前线程id

//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        // 2. 插入数据库
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // selec *from employee limit 0,10;
        // 开始分页插件的配置，参数1：当前页，参数2：每页显示的条数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        // 封装PageResult数据返回：total records
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records); // PageResult有参数构造函数
    }

    /**
     * 启用或禁用员工
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
    //update employee set status=? where id = ?
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.update(employee);

    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    public Employee getbyid(Long id) {
        Employee employee = employeeMapper.getById(id);

        if (employee == null) {
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    public void update(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        // 封装数据
        BeanUtils.copyProperties(employeeDTO, employee);
        // 设置更新时间
        //employee.setUpdateTime(LocalDateTime.now());
        // 设置当前记录修改人id
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
